Totalizing mechanism for computing-machines.



} J. E..W. GREVE.

TOTALIZING MECHANISM FOR COMPUTING MACHINES.

APPLICAEPION FILED DEG. 29, 1313,

Patented Feb. 9, 1915.

2 SHEETSSHEET 1.

v pi eyi'or 5 0? t i re y;

J. E. W. GBEVE; TOTALIZING MECHANISM FOR COMPUTING MACHINES Patenteii Feb, 9,

APPLIGATION FILED DEC. 29, 1918. 1,127,434.

2 SHEETSSHEET 2 nam mjfurn n snares Pr.

JOI-INfiEMiJu WELLIAM GERMANY.

GHEMNITZ, WERKE, velar/rails winirnnornn assertions, n.

TOTALIZILYG MECHANISM FOR CGllIP'UTINGfilIACHINEfi Application-filed December 29,1913.

To aZZcohom it may concern:

Be It known that 1, JOHN EMIL WIL- LIAM Gnnvn, a subject of the Emperor of Germany, residing at Chemnitz, Saxony,

Germany, have invented certain new and useful Improvements in Totalizing Mechanism for Computing-Machines, of which the .following is a specification.

This invention relates to the mechanism for taking the totals in computing machines, and has for its object to provide a mechanism for drawing the totals and intermediate totals in computing machines, which are provided with counting mechanisms which are transposable for the purposes of addition and Subtraction, and its further purpose is'to effect an automatic relation/between the setting of the totalizing lever and the changing or transposing lever; by which the transposition of the counting mechanism is brought about. To this end, according to the present invention, such a connection is provided betweenthe totalizing lever and transposing lever for the changeablecounting mechanism, that the totalizing lever, when it is set for drawing a total or intermediatetotal, automatically sets the transposing lever for the counting mechanism into, adding position, in case said ;t'ran'sposing lever previously stood in the position forsubtraction. multaneously, there is brought into operation a locking mechanism, which prevents a movement of the transposing leverwhen the totalizing lever is set. The setting of the ,transposing lever in the adding position by the changing or" the totalizing lever, can be 'efi'ected, either directly by the-movement of the totalizing lover, or it can be brought about by means of an intermediate connection or link which is set by the opera tion of the totalizing lever, so that upon'the subsequent hand crank movementfthe set-- ting of the transposing lever will be'effected 'by the crank-handle and the driving mechanism of' the computing machine through the medium ofthe above mentioned intermediatelink' I I One form oi the invention is set forth in theaccompanying drawings, in which, Figure-11 is .e fargmentar Sia view, inside elevation, showing the totalizing lever and the transposing lever for the changeable Specification of Lett'ers Patent.

I l i i i l Patenterl'lceb, 9, 1915.

Serial No. 809,384.

vices for connecting theltwo levers, Fig. 2

is a detail plan view, Fig. 3 shows the mechanism of Figs. 1 and 2 in other operative positionsfFig. l shows a side eleva tion of the mechanism by which only an intermediate connection is set by the totalizing lever, and F 5shows a view si.mi- -lar to F 1g. 4t

with. the mechanism in an other operative position.

p The totalizing lever 8, (by which also the intermediate totals are made), is mounted .for oscillatory movement in any well known way upon a shaft 11, mounted in the frame of the computing machine in which my invention is applied, said shaft also carrying a lever 7.' baidlever 7 is provided with a longitudinal slot 7* into which operatively projects a pin 5f mounted on the lever 5, which, in turn is secured on the shaft 8.. Saidshaft 8 extends transversely across the machine and carries on its opposite end a second level" 4. The lever 4 is supplied with a tappet-pin 9 near its free end, and is also pivoted to a draw-bar 2, which, in

turn, is pivotally connected to the transposing lever i 01 the changeable counting mechanism by means of the pin 2 and the slot 2.

The totalizing lever is held in pe sition in any well known manner {not shown), and is released just befcrethe end fot the movement of the hand-crank, Eurfor ing this time, the transposing lever isfalso locked, the pin 2* engaging in thelendof the elongated opening or slot 2 in. the drawbar 2 (Fig. 3) whereby a setting of the transposing lever from the adding to the subtracting position is impossible.

over with for'ce,.there would be a strong tendency for the shaft 8 tobecome distorted, due to the great leverage of the lever 1 and the intermediate connections. For this reason there is preferably provided, for the relief of the'shaft 8 a further locking mecanisin. To this end a pawl 33 is mounted atorymovement in side iraine oft 1e I'fii'lChlDE and is provided with an upwardly extending arm 3 whose head, by

counting mechanism, together with the demeans of the spring 3", is kept'in engagement with the pin .9, upon the arm 4, in the normal postion'of the totalizing lens The pawl 3 is provided with a However, ifa person unfamiliar with the machine should endeavorto throw the lever 1 v iectio'n 3zit'its free end, by which'it can iock oehintl s pin 10 etthe lower end of the lever l. I

T he operation etthe mechanism thus'i ar described is as foilowsz -lf the totalizing lever 6 is swung tothe rear (to the left in the drawings). torthe purpose ofdrawing totals or intermediate totals, then the lower- (as shownin slotted line position'in i}.

themby means of the drew-her 2, sai i lever 1 wilLbe-drawn into eddiingposition, (soliii line position of Fig.=l).,-when the lever 6 is thrown-to the left. the above mentioned clockwise movement, of the arm 4, the pin 9 is removetii r'om contact with the upper arm 3% of the pawl 3 anol the spring 3? operates to draw the pawl" upwarilly, bringing the locking-projection 3 behincl the pin-l0, 3). thus preventing any acciclental or mistaken return of the transposinglever to subtracting position.

In Figs. 1 and 5 is shown another form of the invention.

; Thepa-rts halving, like reference numerals correspomi to the parts er the first iorrn described. in construction snol function. The arm 4, howeven 'is orcviclecl with an shotment i against which the projection or pin 18, cerrierl' 'iov the::hell-cranlelever 22, bears. Sail hell-crank-iever '22, which is suitably rnonntetl on the machine frame, and is ilrawn iipwarcllyhyrc'esns of the spring 22, is provitiecl on its other arm. with a is 22", over which is volzecl the slot 12 or a carrier rticl; Said carrieerocl i9- is linlrecl.

to an oscillatory arm 1 which, for example. is mon'nteclto swing on a etch it on the 'ii'reme of themachine; The carrier-rod 1,2 is further @rovifieci with en abiitrnent 12*, which is arlaritetito oneratively engage pin ofthe transposing lever l. @siti oscillatory arm l lis provided with it servedface can": element M5.- The lever l carries an snti-frictionroller it, which eo apterl to engage in the notches or recesses lEW-ancl l3 formecl at the encls of s 'tracltwe v ll-5 en the lower edge of s rock-her i8. Said rock bar 13 is nivotallv mounted on the stub 13 ancl is helcl in normal engagement with the roller 1 by means of thespring-l A lock-bar 17 is pivoted to one nd of the rock-bar 13. saicl lock-liar 17 s ckle-6. by means of a pin and slot c *CUQEA with the side of the machineframe. lower end the bar 17 is provicled with a notch or recess 17*, in which the lateral projection 16 formed on longitudinally mounted lockingh-ar 16 is adapted to engage Saiti locking-bar leis also sliclsbly mounted.

on the machine l3} pin to the machine frame and is held in engagement with a fixed stop-pin 21. which is also snci slot connections "is" and it", enci'stentis normally sneer the influence of the spring 16. Sam spring 16 tends to tirew the lock ing hair 16- to the left (Figs.

5), its

movement being limited by a pin or abut- Inent on the segment 15, which is one of a plurality of such segments (not shown) ii'iountecl on the shaft of the machine. Upon the segment 15 is also mounted a rocking lever 19, on one endl of which is secure i a tappet roller 19*. The opposite end is attached to a contraction spring 19*,which normally draws the lever 19 into engagement with the pin 19 carried by the segment 15. nient 15 turns in a clockwise direction the roller 19 is caused to hear at the beginning against the boclv of the earn element l lof the lever 14- ancl turn it to one side, but upon the return of the segment, said roller can ricle over the face of the cam element 145. The lever 14 is normally rlrawn to the left (Fig. i) bv inans of a spring li -conneci'ze suitslolvset in the sicle-frame of the machine.

in the second-form above (lescrioed, the arm 4 is turned to the right when the lever 6 is thrown over. in the same manner as in the first olescriloecl form. Thereby the projection or abutment 4 is withdrawn from contact with the pin 18 on the end the hell crank lever 22, anti the latter, under operation of the spring 22 is swung upwardly. By this fiction, the locking-projection 12 on the carrier-bar 12 engages the pin 10 of the transposing lever 1. If the hanci-cranli or the machine (not shown) is pulled. or the rnotordrive of the machine, is started, as thecsse may he, then the s: 'ment 15 is retilted in the direction of .ie arrow. ancl pushes the lever is to'the right. with the help of the striklngrciler 19 of the rocklever 19, sothst the transposing lever 1 is csrriecl out of the position of Fig. 4., which 1 shows the subtracting position, and is placed in the position shown in Fig. 5, or the acidin position. When the segment 15 turns in the direction of the arrow. then the pin retreats from the iOCiilTii-l3fiT .16 and the latter. no 1:1" the a tion of its spring 16 is drawn to the let. l the lateral projection or leg; i6 engages the notch or recess 17? of the locliingbar 1?, whereby the rocking lever 13 is prevented from moving. in this manner, the ti'snsposi'ng lever 1 is l n the ooeition of Fig. 5. the roller 1 ,"i. L m n man the notch or recess 1o,

and oeI hand crank, the lever 1 cannot be caused to assume any other position. ihis locking only occurs, however, after a complete transposition has taken place. since during the period of trzinsposing movement the lever 13 elevate-i by reason of the movement of mamas the roller 1 'overvthe track portion 13",

lock-bar. l7 being also elevated thereby to such an extent that the projection 16 can-' not enter into engagement with the re,- cess 17 The mechanism. of this invention, in its various forms, can obviously be adaptedfor use an mach nes Where a key is used in place of a totalizing lever. Furthermore, the invention can also be adapted for use in connection with nonprintin'g computing.

machines, in order in such machines to secure the zero setting, Without being compelled to transpose the counting mechanism by hand from the subtracting position to the adding position. i What I claim as my invention is 1. In a computing machine, the combination with a lever for operating the totalizing mechanism of the machine, of a lever'for rocking the counting mechanism ir to adding or subtracting positions, and means operative between the totalizing lever-and said counting-mechanism rocking lever to swing the latter to adding position and there positively lock it during a totalizing operation started by said totalizing lever.

52. In a computing machine, the combination with a lever-for operating the totalizing the 1 mechanism of the machine, .of a lever for j rocking the counting mechanism into addmg or subtracting position, a mechanism released by said totalizing lever on an operative stroke to return said counting mechanism rocking lever to adding position, means for actuatlng said return mechanism and means also operated by said return mechanism actuating means to lock said tion when the former is set to draw a total;

and means for locking said counting mech anism rocking lever in its adding position during a totalizing operation,

In testimony whereof I my signature in presence of two Witnesses. JOHN EMIL WILLIAM GREVE. YVitnesses: 1

F. Srnenn H. Mucus. 

